My back of the envelope list. The titles can get partially arbitrary making it just now, and the ordering is certainly arbitrary (save for the top 2) throughout:
1. Werckmeister Harmonies - Bela Tarr
2. Tropical Malady - Apichatpong Weerasethakul
3. In the Mood for Love - Wong Kar-Wai
4. Flight of the Red Balloon - Hou Hsiao-Hsien
5. Yi Yi - Edward Yang
6. The New World - Terrence Malick
7. Before Sunset - Richard Linklater
8. Ten - Abbas Kiarostami
9. Still Life - Jia Zhang-ke
10. Blissfully Yours - Apichatpong Weerasethakul
11. Inland Empire - David Lynch
12. Still Walking - Hirokazu Koreeda
13. Mother - Bong Joon-ho
14. Silent Light - Carlos Reygadas
15. Virgin Stripped Bare by Her Bachelors - Hong Sang-soo
16. Syndromes and a Century - Apichatpong Weerasethakul
17. Goodbye Dragon Inn - Tsai Ming-Liang
18. Secret Sunshine - Lee Chang-Dong
19. Cache - Michael Haneke
20. Summer Hours - Olivier Assayas
21. Mulholland Drive - David Lynch
22. Cafe Lumiere - Hou Hsiao-Hsien
23. No Country for Old Men - Coen Brothers
24. White Material - Claire Denis
25. The World - Jia Zhang-ke
1. Werckmeister Harmonies - Bela Tarr
2. Tropical Malady - Apichatpong Weerasethakul
3. In the Mood for Love - Wong Kar-Wai
4. Flight of the Red Balloon - Hou Hsiao-Hsien
5. Yi Yi - Edward Yang
6. The New World - Terrence Malick
7. Before Sunset - Richard Linklater
8. Ten - Abbas Kiarostami
9. Still Life - Jia Zhang-ke
10. Blissfully Yours - Apichatpong Weerasethakul
11. Inland Empire - David Lynch
12. Still Walking - Hirokazu Koreeda
13. Mother - Bong Joon-ho
14. Silent Light - Carlos Reygadas
15. Virgin Stripped Bare by Her Bachelors - Hong Sang-soo
16. Syndromes and a Century - Apichatpong Weerasethakul
17. Goodbye Dragon Inn - Tsai Ming-Liang
18. Secret Sunshine - Lee Chang-Dong
19. Cache - Michael Haneke
20. Summer Hours - Olivier Assayas
21. Mulholland Drive - David Lynch
22. Cafe Lumiere - Hou Hsiao-Hsien
23. No Country for Old Men - Coen Brothers
24. White Material - Claire Denis
25. The World - Jia Zhang-ke
I hard a reallly hard time getting trough Ten by Abbas Kiarostami, but its also one of his tougher works imo.
Im reallly surprised that No Country for Old Men is on your list. It's definitely an ok / good movie but yeah overrated imho.
Nice list!